Select Board & Class
what is the reason for low productivity of oceans despite occupying 70 % of the surface?
i have to make biology investigatory project of class 12 cbse on topic ecosystem.i dont know how to make it .please give me a sample project and help me to do this
pls explain this....
ecosystems are not exempt from the second law of thermodynamics.they need a constant supply of energy to synthesise the molecules they require,to counteract the universal tendency towars increasing disorderliness.
what is the limitation of detritus food chain?
carbon cycle diagram
How would you explain the paradox that the pyramid of biomass in sea is inverted because biomass of fishes exceeds that of phytoplankton?
measurement of biomass in terms od dry weight is more accurate. why?
pyramid of energy is always uprightupwards.why?
what is the difference between a saprophyte and saprotroph?
Who is considered as father of environmental science?
1)Difference between detritus food chain (DFC) and grazing food chain (GFC)?
2)Represent detritus food chain by ray diagram ?
What does this line means,"In an aquatic system, GFC is the major conduit for energy flow" ?
construct an ideal pyramid of energy when 1000000 joules of sunlight
examples of gaseous and sedimentary cycles
Difference between standing crop and standing state
collection of medicinal plants and its uses . how to prepare medicine using those med. plants??
plz help me on this . give the names of @least 13 common medicinal plants ?
who perfomed the blender experiment in regard to certain nature of dna? what was the objective of this experiment ? pls explain the procedure in details
what is meant by term ecological succession?? provide details regarding ecological succession on land and water.
what is meant by FADH2 and NADH2 in bioenegetics???what r its functions?
Define ecological pyramids and describe with examples, pyramids of number and biomass.
1. In an ecosystem dominated by trees, the pyramid (of numbers) is _________ type. How is it inverted ? Can't it be spindle shaped too?
2.Which one of the following has the largest population in a food chain? shouldnt it be producers as decomposers are not included in the food chain?.
why measurement of biomass in terms of dry weight is more accurate?
what is the difference between regulators and conformers
what is d difference between fragmentation and catabolism?????????
why is the pyramid of biomass of phytoplankton inverted ?
DRAW THE PYRAMID OF BIOMASS IN A SEA AND IN A FOREST. EXPLAIN GIVING REASONS WHY THE TWO PYRAMID IS DIFFERENT?
when is the pyramid of biomass spindle shaped?
If we were to count the no. of insects feeding on a big tree,we would get an inverted pyramid.Why??
State the difference between the first trophic level of detritus food chain and grazing food chain.
The first trophic level of detritus food chain is often the dead and decaying organic matter whereas the grazing food chain starts with the living green plants.
The first trophic level organisms of detritus food chain are saprophytes whereas the starters of grazing food chain are producers.
Is that second point actually right? How can the organic matter and saprophytes be the same?Aren't saprophytes the consumers of detritus?Correct me if i'm wrong.
suggest some investigatory projects of biology
why is it said that larger amount of energy flows through detritus food chain?
The second trophic level in a lake is-
(a) Phytoplankton
(b) Zooplankton
(c) Benthos
(d) Fishes
A man who is eating curd/yoghurt can be placed in which trophic level and why?
what is sere
Differences between Carbon and Phosphorous cycle ?
What is the difference between decomposers and detritivores?
why are algae a good source of food supplements
Is the pyramid of numbers for forests inverted or upright? Explain.
how does camouflage help an insect?
what is a biomass pyramid?
Can you give 2 differences between carbon phosphorous cycle?
What is meant by competitive release in an ecosystem?
Why Saprophytes are not included in pyramids?
plz help me...
the differences between grazing food chain and detritus food chain ?
difference between upright pyramid and inverted pyramid?
rnWhy are oceans least productive?rn
Why are oceans least productive?
1) Vertical distribution of different species occupying different levels is called ___________.
2) Of the incident solar radiation (on earth) less than 50% of it is __________________.
meaning of detritus?
Secondary producers are
(a) Herbivores
(b) Producers
(c) Carnivores
(d) None of the above
what are plant hormones? give the uses of the plant hormones like auxins,gibberlins,cytokinins and artificial hormones like ABA,ethylene??
why does human body maintain constant temperature both in summerss and winters ?
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)
Syllabus
what is the reason for low productivity of oceans despite occupying 70 % of the surface?
A) 0.03%
B) 3%
C) 10%
D) 33%
i have to make biology investigatory project of class 12 cbse on topic ecosystem.i dont know how to make it .please give me a sample project and help me to do this
pls explain this....
ecosystems are not exempt from the second law of thermodynamics.they need a constant supply of energy to synthesise the molecules they require,to counteract the universal tendency towars increasing disorderliness.
what is the limitation of detritus food chain?
carbon cycle diagram
How would you explain the paradox that the pyramid of biomass in sea is inverted because biomass of fishes exceeds that of phytoplankton?
measurement of biomass in terms od dry weight is more accurate. why?
(1) High productivity
(2) High diversity
(3) Complex food chains
(4) More cycling of nutrients
Answer is (1). How?
pyramid of energy is always uprightupwards.why?
what is the difference between a saprophyte and saprotroph?
Who is considered as father of environmental science?
1)Difference between detritus food chain (DFC) and grazing food chain (GFC)?
2)Represent detritus food chain by ray diagram ?
A] CARNIVORES
B] PURE VEGETARIANS
C] VEGETARIANS ALONG WITYH USE OF MILK
D] VEGETARIANS ALONG WITH USE OF MILK AND EGGS
What does this line means,"In an aquatic system, GFC is the major conduit for energy flow" ?
construct an ideal pyramid of energy when 1000000 joules of sunlight
examples of gaseous and sedimentary cycles
Difference between standing crop and standing state
collection of medicinal plants and its uses . how to prepare medicine using those med. plants??
plz help me on this . give the names of @least 13 common medicinal plants ?
who perfomed the blender experiment in regard to certain nature of dna? what was the objective of this experiment ? pls explain the procedure in details
what is meant by term ecological succession?? provide details regarding ecological succession on land and water.
what is meant by FADH2 and NADH2 in bioenegetics???what r its functions?
Define ecological pyramids and describe with examples, pyramids of number and biomass.
(a) Both decomposition and NEP would decrese
(b) Both decomposition and NEP would increase
(c) Neither would change
(d) Decomposition rate would decrease and NEP would increase
1. In an ecosystem dominated by trees, the pyramid (of numbers) is _________ type. How is it inverted ? Can't it be spindle shaped too?
2.Which one of the following has the largest population in a food chain? shouldnt it be producers as decomposers are not included in the food chain?.
why measurement of biomass in terms of dry weight is more accurate?
1) species composition
2)stratisification
3)trophic structure
4) standing crops
5)standing state
what is the difference between regulators and conformers
what is d difference between fragmentation and catabolism?????????
why is the pyramid of biomass of phytoplankton inverted ?
DRAW THE PYRAMID OF BIOMASS IN A SEA AND IN A FOREST. EXPLAIN GIVING REASONS WHY THE TWO PYRAMID IS DIFFERENT?
when is the pyramid of biomass spindle shaped?
If we were to count the no. of insects feeding on a big tree,we would get an inverted pyramid.Why??
State the difference between the first trophic level of detritus food chain and grazing food chain.
The first trophic level of detritus food chain is often the dead and decaying organic matter whereas the grazing food chain starts with the living green plants.
The first trophic level organisms of detritus food chain are saprophytes whereas the starters of grazing food chain are producers.
Is that second point actually right? How can the organic matter and saprophytes be the same?Aren't saprophytes the consumers of detritus?
Correct me if i'm wrong.
suggest some investigatory projects of biology
why is it said that larger amount of energy flows through detritus food chain?
The second trophic level in a lake is-
(a) Phytoplankton
(b) Zooplankton
(c) Benthos
(d) Fishes
A man who is eating curd/yoghurt can be placed in which trophic level and why?
what is sere
Differences between Carbon and Phosphorous cycle ?
1.Nitrogen cycle 2.Carbon cycle 3.Sulphur cycle 4.Phosphorus cycle
What is the difference between decomposers and detritivores?
a) Ecdysone
b) Rotenone
c) Parathion
d) Malathion
b)why are the pyramids referred to as upright or inverted? explain.
1). first trophic level
2). second trophic level
3). third trophic level
4). fourth trophic level
its answer according to me should be fourth trophic level as first one are plants, second is cow, third should be bacteria which convert milk into curd fourth one should be the man eating the curd, but given answer is third trophic level. but how?
why are algae a good source of food supplements
Is the pyramid of numbers for forests inverted or upright? Explain.
how does camouflage help an insect?
what is a biomass pyramid?
Can you give 2 differences between carbon phosphorous cycle?
a) 37 kg/m2
b) 11 kg/m2
c) 5 kg/m2
d) 1.5 kg/m2
What is meant by competitive release in an ecosystem?
Earth worm, bird, snake, vulture, grass, grasshopper, frog, decaying plant matter.
1 permeabldand differentially permeable respectively
2 both semipermeable
3 semi permeable and permeable
4 both differential permeable
Why Saprophytes are not included in pyramids?
plz help me...
the differences between grazing food chain and detritus food chain ?
difference between upright pyramid and inverted pyramid?
rn
Why are oceans least productive?
rn1) Vertical distribution of different species occupying different levels is called ___________.
2) Of the incident solar radiation (on earth) less than 50% of it is __________________.
(1) Deep sea
(2) Freshly formed rain water pond
(3) Forest ecosystem
(4) More than one option is correct.
Answer is (4). How is it? What are the structural components?
meaning of detritus?
Secondary producers are
(a) Herbivores
(b) Producers
(c) Carnivores
(d) None of the above
what are plant hormones? give the uses of the plant hormones like auxins,gibberlins,cytokinins and artificial hormones like ABA,ethylene??
why does human body maintain constant temperature both in summerss and winters ?